Perforator for well casings or tubes.



P. P. YfiNGLING.

PERFORATOR FOR WELL GABINGS 0R TUBES.

APPLICATION FILED SEPT. J, 1912 Patented Dec. 2, 1913.

l vdwaooeo PAUL I. YU'NGLING, OF LOS ANGELES, CALIFORNIA.

PEBFORATOR FOR WELL CASINGS R TUBES.

Specification of Letters Patent.

Application filed September 9, 1912. Serial No. 719,438.

Patented Dec. 2, 1913.

To all whom it may concern:

Be it known that I, PAUL F. YtiNemNo,

a citizen of the United States, residing at Los Angeles, in the countyof Los Angeles and State of California, have invented certain new anduseful Im rovements in Perforators for Well Casings or Tubes, of whichthe following is a specification.

This invention relates to improvements in perforators for well casingsor tubes and embodies in its construction a tool that is adapted to beattached to a regular drilling string, such tool comprising a top orupper member or substitute for engagement w1th the tool and drillingstring, a lower memher having grips to engage with the inside of thecasing to hold the tool against downward movement and a middle sectionor member that is maintained in longitudinal movable relation with thelower member to project when lowered punches that are associated withthe middle and the lower memhere.

In the accompanying drawings Figure 1 is a side elevation showing myimproved casing perforator for wells with the parts positioned to belowered to the bottom of the well casing. Fig. 2 is a side elevationshowing the parts in position after perforating the well casing. Fig. 3is a longitudinal section showing the parts positioned prior to raisingthe tool. Fig. 4 is a longitudinal section showing the parts in positionto be dropped in the well casing. Fig. 5 is.a transverse section on theline 55 of Fig. 4. Fig 6 is a transverse section on the line 66 of Fig.3. Fig. 7 is a detail perspective view of the punch-block and arm, andFig. 8 is a perspective viewof one of the punches.

Referringt'o the drawings, the casing 8 of the well ma have at 1ts lowerend a point 9, when t e well is driven but when bored the point will notbe present. The casing or tube and the well tools or rig are of theusual type used in driving or boring oil or Artesian wells, and theperforator is constructed to be attached to the regular drilling string.v

The upper member 10 of the casing perforator is provided at eachend withreduced portions which are threaded to form taper joints, the upperjoint being of standard size to engage the socket of a lower rod of astring of tools and this upper memher is practically a substitute thesame having an intermediate squared portion to be engaged by a wrench.The middle sectlon or member 11 of the casing perforator is cylindricaland hollow, the upper ortion of the bore is tapered and thrcadc -toreceive the lower end of the upper member, the main bore extendin fromthe threaded socket to a point near tie lowest end of the section wherethe bore is reduced to provide a shoulder 12 and a reduced bore for thepassage of the bed of a bolt 13 the cylindrical head of w ich contactswith the shoulder 12 when the lower member 14 which is connected to themiddle member by the bolt 13 is at the limit of its downward movement.The head of the bolt 13 fits to slide in the larger bore and its bodyportion slides in the lower bore, said bolt having in the upper portionof its head a transverse recess so that the bolt may be turned to effectengagement of its lower threaded end with the internally threaded boreat the upper end of the lower member 14. The middle section or member 11is provided on opposite sides from its lowest end upward with inclinedways 15 that have as a part thereof laterally extending recesses-toreceive reduced sides of punch blocks or heads 17 that are pivoted tothe upper ends of arms 18, the arms being pivoted at their lower endswithin recesses formed in the lower member 14, being held in swingingengagementwith the lower memberand in the recesses by pins 19. The arms18 which carry at their upper ends the punch blocks or heads 17 aretapered longitudinally and their lower ends on their inner sides may bebeveled to register with the inclined inner walls of the recesses whentheir outer sides are in alinement with the outer surfaces of the middleand the lower sections.

The punch blocks 17 have internally threaded apertures to receive theinner threaded ends of the punches 20, said punches having inclinedupper surfaces and beveled end portions to Eovide chisel cutting edges,the punches ma 'ng through the casing or tube tapered openings, thesmaller diameter of the openings being on the outside which preventsclogging of the openings. The sides of the unches are flat which admitsof the same belng readily replaced by the use of a suitable tool. Theinclination of the ways for the arms and the size of the punch blocksand punches is such that the punches lowering into vthe lower ends ofthe arms 18 the lower .member At a suitable point below the recesses forhas apertures 21,21, the outer porthereof being enlarged to providerecesses for the heads of screw-threaded plugs 22, such plugsbeinghollowed out to receive springs 23 20 that bear upon the plugs andballs 24 seated in cylindrical bushings 25 to press the balls toward aslide bar 26 with recesses to receive a part of the balls to effectfrictional engagement of the slide bar with the lower member to hold theslide bar projected against the action of a compressed spring. A pair ofgrips 27 is associated with the lower member and is adapted to slideupward and outward each grip being mounted on sloping ways28, the gripswhen moved upward engage the inner side of the pipe or casing when thegrip rod or slide bar 26 has been tripped, the means hereinbeforedescribed holding the grip rod to posilow the pin the grip rod isreduced in tion the slides at the lower portion of the ways. The lowermember has through the center portion of the ways 28 and through saidlower member slots 29 for the passage of a transverse pin 30, that iscarried by the grip rod and passes through the slots 29 .to engage thegrips 27 the grip rod. The pin 30 is fitted tightly in the grip rod andloosely in the grips, and 13e- 11- ameter for passage through a cap 31that engages the externally threaded end of the lower section andbetween the. cap and the shoulder on the grip rod there is a spring 32which tends to force the grip rod upward when the friction locks arereleased. The upper portion of the slide bar or grip rod 26 flattenedsides and the recesses 26 for the balls 24 are formed in said fiat-Itened sides, this construction providing a "fiat way for the balls orfriction positions The rod lower end a block locks for their lower orretracted 26 has attached at its or ball 33 for contact with holding thegrips in I the bottom of the well and the dropping of the tool releasesthe friction locks and the 601' springl32. moves the rod 26 with itsattached grips upward to engage the tube and hold I the lower member ofthe casing perforator against downward movement after which the partsabove descend to project the punches;

run backward long enough to a lower member to move the same with waysfor punch blocks, a

In operation the upper member or substitute is connected to the wellrods or drilling string, the pipegrips ,are set by ulling them or theball down-ward until the riction locks engage the grip rod, and the toolis lowered to the bottom of the well wherethe ball or block releases thefriction looks so that the spring will move the grips upward to engagethe tube, the tool is then raisedto the point where it is desired tohave the lowest perforations, and the engine is reversed an upon whichthe grips engage the pipe and hold the lower member stationary andagainst downward movement; the weight of the tools and stroke of jarsclose the middle member down to' the top of the lower member whichaction forces the punches out through the pipe to perforate the same,upon raising the tools the punches are drawn back and the grips releasedso that the tool may be raised for repetition of the operation.

I claim 1. In a tool for erforating well casings, iaving gripsassociated therewith, frictional-locks for the grips, a spring formoving a part outward, means actuated by impact for releasing thefrictional locks, an upper member maintained in movable relation withthe lower member, inclined ways in said upper member, punch blocksseated in the ways and punches carried by the punch blocks to beprojected when the'members are moved one toward the other.

2. In a well casing perforator, a lower member having inclined ways forgrips, grips seated in said inclined ways, means for holding the gripsin a retracted position and means actuated by impact to release themeans for holding the grips in a retracted position to move the gripsupward and outward, an upper member having inclined bolt for .holdingthe members in sliding engagement one with associated with thefrictional locks upward and the grips.

close the jars,

the other, and punches associated with the members to be projected bymovement of the upper member toward the lower member.

3. In a per'forator for well casings,-two members maintained inlongitudinally movable relation one to the other, punches associatedwith the members to be projected when one of the members is moved towardthe other member, grips associated with the lower member to hold thesame against downward movement when projected, a slidable bar associatedwith the grips, locks for .frictionally holding the grips retracted andresilientme'ans for moving the bar to project the grips upon release ofthe locks. v

4. In a casing perforator', a lower member having inclined guidewa-yswhich are intersected by a slot, grips associated with the guideways, abolt having'adjacent to its upper end recesses the lower end of the boltextending beyond the lower member, a

the boLt sprmg actuated means for engagement with the recesses in thebolt to hold the bolt in such position that the grips will a beretracted, an upper member maintained in slidable relation with thelower member, inclined ways-in said upper member, punch blocks slidablein the ways and arms connected 'to the punch blocks and to the lowermember.

5. In a pfrforator for well casings, an upper mem er having alongitudinal bore and an opening at its lower ortion of less diameterthan diameter of t e bore above, inclined ways in the lower ortion ofthe upper member, a lower mem er, a bolt for connectin the upper memberin slidable relation wit the lower member, punch blocks mounted to slideupon the inclined ways,-

arms pivoted to the lower member and to the unch blocks, a grip-rodhavin recesses ormed therein, spring projected halls that engage therecessed portions of the grip-rod, a spring for retractin the grip-rodand grips associated with t e grip-rod and the lower member.

6. In a casing perforator, an upper and a lower member maintained inlongltudinally movable relation, a string of rods associated with theupper member, inclined ways 1 formed in the upper member, punch-headsassociated with the ways, arms pivoted to the punch-heads and to thelower member, and means associated with the lower member to holdthe'same in non-movable relation with the casing, the arts beingorganized so that in use the weig t of the lower member will move thesame away from the upper member to retract the punches and so that theweight of the upper member and rods associated therewith will roject thepunches when the lower sectj on is held in non-movable relation with thecasing.

7. In a casing perforator, an upper member pibvided with a boltreceiving bore, inclined punchsblock receiving ways, a lower member, abolt for connecting the members in longitudinally movable relation, armsconnected to the lower member and t0- punch-blocks that engage thepunch-block ways, a longitudinally movable grip-rod associated with thelower member and provided with a part that extends below the lowermember, inclined wa s, grips movable over the inclined ways, s otsthrough the lower member, a pin that engages the grips and the grip-rodand a rip-rod lock which is adapted to be release by impact of thegrip-rod with the bottom of the well.

In testimony whereof I aflix my signature in presence of two witnesses.

PAUL F. YUNGLING. Witnesses:

W. H. RIE'I'HMAIER, Onrvna S. BARNUM.

